These are the original Casio FX-880P Handheld computer in production around
1990. They are all brand new and in their original boxes with manual etc. Only a small number of these machines available.

The FX-880P was the top of the range Casio handheld with 2 x 32 character
display and 32Kb of memory which compares well even with modern calculators.
Along with all the usual functions you would expect to find on a scientific
calculator it is programmable in the BASIC language. Back in 1990 BASIC enjoyed
wide acceptance. It was installed by default on most PCs and taught in many
colleges and universities so to find it on a handheld was a real innovation.
The Fx880p has a built-in library of BASIC formula and functions. Any function
in the library can be executed from a regular BASIC program by using GOTO "LIB0:NNNN" where
NNNN is the function number (e.g. 5010 for prime factorization). The command "GOTO
LIB0:0400" executes a self-test program. Example program
below :